Puppet-valve



(No Model.)

0. F. PUTNAM.

PUPPET VALVE.

No. 339,809. Patented Apr. 13, 1886.

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UNITED STATES PATENT OFFICE.

CHARLES FRANKLIN PUTNAM, OF FITCHBURG, MASSACHUSETTS.

PUPPET-VALVE.

SPECIFL CATION forming part of Letters Patent No. 339.809, dated April13, 1886.

Application filed January 12, 1886.

To aZZ whom it may concern:

Be it known that I, CHARLES FRANKLIN PUT- NAM, of Fitchburg, in thecounty of \Vorcester and State of Massachusetts, have invented certainImprovements in Balance Puppet-Valves for Steam-Engines, of which thefollowing isa full, clear, and exact description, reference being had tothe accompanying drawings, which make part of this specification, andwhich are sectional views of a valve-chest and valve with myimprovements attached.

The object of my invention is to construct the valves so that they shallact as reliefvalves for the escape of water that may be pent up in thecylinder, or for any excessive pressure that may result fromcompression, &o., and is an improvement on Patent No. 213,030, March 11,1879. This valve is also applicable to hydraulic-pressure pumps.

In the drawings, Figure 1 is a vertical section of a steam-chest andvalve constructed according to my invention; and Fig. 2 is a verticalsection of the valve, showing a modification of the valve, with thespring protected against steam.

To enable others skilled in the art to make and use my invention, I willnow proceed to describe the manner in which I have carried it out.

In the drawings, A B represent those parts of the chest which connectwith the boiler and cylinder, and these are separated by the walls orpartitions a and b, in which are the valve openings or apertures a b.The valves C C, which cover the apertures a b, are placed i Serial No.188,279. (No model.)

over each end of the valve-stem D and bringing them up against theshoulders (I d formed on the stem. The lower valve, C, is rigidlysecured in its position by a pin or other suitable means, while theupper valve, C, rests on the shoulder d, and is free to move upward orfrom the shoulder. To regulate and adjust this movement is the essentialfeature of my invention.

On the threaded end of valve-stem D, I place the screw-cap E, andbetween this cap and the valve 0 is interposed the spiral spring F. Itis evident from this description that the resistance of the valve C canbe readily adjusted to any desired pressure of the steam, so that thevalve C may be held at any desired pressure and be raised from its seatwithout necessarily raising or opening the lower valve, C.

I am aware that it is not new to rest the valves upon the shouldersformed on the valve-stem, nor do I claim such,broadly,as my invention;but

WVhat I claim as my invention, and desire to secure by Letters Patent,is-

The valve-stem D, provided with the shoulders d d, and the valves C C,in combination with screw-cap E and spring F, constructed and arrangedsubstantially as and for the purpose set forth.

CHARLES FRANKLIN PUTN AM.

\Vitnesses:

JoHN L. PUTNAM, H. J. HARRINGTON.

